For Half-Life Fans, the original version of the Health Charger. Material: Versatile natural black plastic. Size : 9.25 x 13.3 x 2.6cm. This mini robot being designed replicates the behavior of the original Health Charger in the Half-Life video game. The robotic version is under development and includes: an cyan diode (cyan glow in the body, see video below), one linear motor to push back & force the charger eye (see video below) driven by an L393D, a toggle switch, an ATTiny85 chip on which I inject Arduino C code to drive everything. Power supply: Lithium battery: 3.3v - Note: the robotic version requires iterations at the 3D Printing level, in electronics (PCB) and in code. I therefore sell the non-robotic version to finance the development of the robotic version